I go fishing on the coast with a group of guys (around a dozen), it's our annual guys only trip. We usually camp for 2 nights at the 50mi marker which means 50mi from pavement, let alone any provisions. I bring 2 of the blue Aquatainers which is just enough for us. We resort to the drinking water if we run out.

We don't drink the water in the containers (most of our drinks come from cans) and our washing is minimal since we use paper plates etc. We mostly wash hands, shower, rinse things off.

My teardrop has a 6 gallon water tank(about 5 gallons usable), and I frequently drain it on a three day camping weekend. Like Jack says, there's usually water available, so I carry a one gallon plastic jug to tote water to the trailer and refill the tank.

Good points, all.... I doubt I would use a lotta watta , and things that need it like juice, tea... would already be made at home.

Is there a reason you're not supposed to drink the water out of those blue containers? I thought they were okay for that.
And I did think about the spouts at most state parks etc but having the water right there is another plus to the teardrop -- plus having the water handy at tailgating, road trips, etc.

when i go to burning man, i can drink a gallon of water a day, easily. on regular camping trips, not so much. roy and i have one 2 gallon and one 5 gallon foldable containers. we usually fill them both, but freeze the 2 gallon one solid and toss it in the cooler. the 5 would carry us through 4 days in the catskills with enough to share with people, the 2 would serve as ice for the cooler, and ice water source after the second day.

if you had to decide between the 2 and the 7, get two or three 2s. that lets you make judgement calls and fine tune what you're bringing with you.

When not in the conservation mode 2 of us we go through about 3 gallons a day washing hands, brushing teeth, doing dishes and making coffee in the morning. Other than that We don't drink water outa the tank, just don't care for the taste. Got a 9 gallon tank in the TD. We have a hose to fill the tank if it needs it, and always have bottled water when we are camping. Just my 2 cents.

There's no reason to distrust the blue water containers. Just watch the water you get to fill them! Strange water is always suspect.

That is the reason all explorers took a brewer along on voyages, they knew that beer was safe to drink, they just didn't know that boiling it was the reason. Beer is also the reason that the pilgrims got out at Plymouth Rock. They were running out of beer and just wanted to get rid of the passengers. My point is drink beer, don't drink the water, fish **** in it.
Brwbier

For drinking water, I freeze gallon jugs, or 2 litre soda bottles, of water, (lid off) upright in the freezer, and put them in the ice box. For "everyday water" I take along the rectangle jugs that cat litter comes in, 7 lb. size (about a gallon), or 14 lb. size, (about 2 gallon). As they are not round, they fit in small spaces, and if I don't want to take them home, I can throw them away.